Tool for dressing stone



(No Model.)

H. A. KIMBALL.

TOOL FOR DRESSING STONE.

Patented June 12,1883.

FICJ

UNITED STATES PATENT OFFICE.

HIRAM A. KIMBALL, OF PHILADELPHIA, PENNSYLVANIA.

.TOOL FOR DRESSING STONE.

' SPECIFICATION forming part of Letters Patent No. 279,488, dated June 12, 1883. Application filed April 14, 1882. (No model.)

To aZZ whom it may concern Be it known that I, HIRAM A. KIMBALL, a citizen of the United States, residing at Phila: delphia, in the county of Philadelphia and State of Pennsylvania, have invented a new and useful Improvement in Tools for Dressing Stone, of which the following is a specification.

This invention is an improvement on the one ,for shaping and dressing stone, for which I obtained Letters Patent May 29, 1877, and which was numbered 191, 241.

The nature of the invention will be understood by the following description.

In the accompanying drawings, which make a part of this specification, Figure l is a side view of the improved tool, partly in section. Fig. 2 is an end view.

Like letters of reference in both figures indicate the same parts.

A represents a cutter-head having a shank, b, for connecting it with a spindle or'niandrel, which is connected with the motive power by any suitable means. The cutter-head is provided with one or more cutting-disks, 0. Four such disks are shown in the drawings. They turn freely on pins D, which are screwed into the cutter-head, with their heads 0 bearing against the outer sides of the disks, and holding the inner sides of the latter slightly pressed against the inclined surfaces 01 of the cutter-head, the inclined surfaces being in a plane from ten to twenty degrees from that of the face of the cutter-head, according to the character of the stone to be dressed. The disks are also supported by means of the washer E, which. has inclined surfaces d, which correspond to the surfaces d of the cutter-head, so as to bear fairly against the outer flat sides of peripheral edge of the washer E, fitting against the curves 9 of their heads 0. These curves 9 are formed by turning them, when the pins D are screwed up, so as to make an accurate fit to the washer E, and thus to prevent the possibility of the pins turning around when the 1atter is held in place by the central screw, D.

The bevels h, which form the cutting-edges of the disks, should vary with the character of the stone to be dressed, and at the same time preserve their slight contact with the stone as the cutter-head A revolves.

As in my former patent above mentioned, the disks 0 have a continuous rolling movement on the stone G, imparted by the revolutions of the cutter-head A, whereby a regular and continuous biting into the surface is effected, and chips are cut off by pressure instead of scraping, as ordinarily, and consequently the work is more expeditiously effected. The disks may have slight notches in their cutting-edges to facilitate their rolling in contact with the stone.

I claim as my invention In a tool for dressing stone, the combination of the cutting-disks C, screw-pins D, having heads with curves central washer, E, and screw-pin D, with the cutter-head A, having an annular incline, 11, substantially in the m anner and for the purpose set forth.

THOMAS J. BEWLEY, STEPHEN USTIOK. 

